Key Features
Superior Power Performance

350A continuous current rating

3-phase 200-230V AC input (50/60Hz)

High overload capacity (350% peak torque for 50ms)

Advanced Motion Control

SSCNET III/H high-speed network (100Mbps)

22-bit high-resolution encoder support

Advanced vibration suppression control

Auto-tuning function with mechanical resonance suppression

Enhanced System Integration

Compatible with all MR-J4 servo motors

Supports MELSEC PLC and CNC systems

DIN rail mounting capability (with adapter)

Industrial Robustness

Compact, slim design (145 × 220 × 179mm)

IP20 protection (requires proper enclosure)

0°C to 55°C operating temperature range

50,000-hour design life under normal conditions

Smart Functions

Built-in regenerative resistor

Energy optimization modes

Comprehensive diagnostic functions

Safety torque off (STO) function

Technical Specifications
Parameter Specification
Model MR-J4-350A4
Rated Output 350A continuous
Input Voltage 3-phase 200-230V AC (50/60Hz)
Control Method Current/Speed/Position/Torque control
Feedback Interface 22-bit absolute encoder
Communication SSCNET III/H (optical)
Protection Overcurrent/Overvoltage/Overheat
Response Frequency 3.5kHz
Dimensions (W×H×D) 145 × 220 × 179 mm
Weight Approx. 5.5kg
Typical Applications
Large industrial robots

Heavy-duty CNC machines

Press machines

Material handling systems

Injection molding machines

Large-scale automation systems